Machine for straining paper-pulp.



W. W. BEAUMONT.

MACHINE POP STRAINING PAPER PULP.

APPucmoN FILED mm. 191e. 1,237,280. Patented Aug. 21, 1917.

2 SHEETS--SVHEET l.

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w. w. BEAUMONT.

MACHINE FOR STRAINING PAPER PULP.

APPucATloN FILED MNA, me.

Patented Aug. 2l, l1917.

2 SHEETS-SHEET 2.

INvENTo R'.

WILLIAM WORBY BEAUMONT, OF'WESTMINSTEB, LONDON, ENGLAND.

MACHINE FOR STRAINING-VPAPER-PULP.

Specification of Letters Patent.

Application led January 4, 1916. Serial No. 70,167.

Britain and Ireland, residing at The Outer` Temple, 222 Strand, in thecity o f Westminster,` London, England, have invented new and usefulImprovements in Machines for Straining Paper-Pulp, of which the fol- 'l.lowing is a specification.

This invention relates to paper-pulp straining machines of the rotatingdrum type, such as described in the specification to the United Statespatent granted to me and dated January'llth, 1916 No. 1,166,882 f andhas particular reference to the `formation of the joints between thestrainer-drum trunk-ends and the pulp-vat; these joints being of such acharacter as to admit of the drum partaking of vibratory and rotativemovements without permitting leakage of water or pulp from the pulp-vatto the strained pulp delivery outlets.

In the specification to my aforesaid Letters Patent No. 1,166,882 aredescribed various modes in which a face joint may be formed between thestationary and moving parts before referred to; my present inventionconsists in certain improvements in detail in the construction andmounting of the parts constituting such joints upon plane asdistinguished from cylindrical surfaces. j

In the accompanying drawings, Figure 1 is a sectional View of a portionof a strainerdrum of the vibratory and rotative type, showing the jointbetween the drum and the vat wherein the said drum is mounted. Fig. 2 isa side elevation of one endof the'vatcontained drum. Fig. 8 is partly aside elevation of the strainer drum-end, and partly a longitudinalsection showing one of the cradle arms, wherein the. drum is mounted;the drum being furnished with two face joints respectively arranged infront of and behind the cradle arm. Fig. 4 is a transverse section landFig. 5 a side elevation, partly in section, illustrating certain detailshereinafter referred to; and Fig. 6 is a longitudinal sectionillustrating a modified construction wherein' the septum hereinafterreferred to is arranged horizontally.

According tothe construction illustrated in Fig. 1, I arrange within thestrainer vat A, toward one of its extremities, B, a semi` circular orhorseshoe-shaped member C, internally fianged and having attachedthereto by its outer edges a flexible rubber or other pliant and elasticseptum D. To the inner edge of the septum D is attached an innerhorse-shoe-shaped yor approximately semi-circular member E carrying ajointmaking piece F, formed of metalor other suitable material. Thejoint-making piece F bears against the face of the flange G of the` drumH in such a manner as to form a water-tight joint without interferingwith either the rotation, the vibration or the oscillation, of the drum.Moreover, the mounting of the 'joint-making piece F upon Patented Aug'.21, 1917.

the member or carrier E and the attachment of the latter to the pliantand elastic septum D permits of the working faces of the joint remainingin contact, although small changes may occur, in a longitudinaldirection, in the position of the drum, or in the angular positionpresented by the face of the flange G.

The upper ends or the horns of the horsel shoe-shaped member` E arecarried by any suitable means, at or near the upper edges of the vat;such means being adapted to permit of the face F being maintained, bymeans of springs or their equivalents, in close contact with the face ofthe flange G. The horseshoe-shaped members E are held against verticaldisplacement by means of keeps E', as shown in Figs. 2 and 4.

In Fig. 2 is illustrated a method of applying pressure to the member orcarrier E. The upper end of one horn of the horseshoe-shaped member' Eis seen where it is formed with a horizontally projecting lug resting onthe upper edge of the vat, and the piece C is brought up above thevat-edge. Pivoted thereto is a bell-crank lever J, J, whereof thehorizontal arm 'carries anadjustable weight K, while the lower part ofthe vertical arm presses against the member E; a weighted lever of thischaracter being attached .at eachside of the strainer. It will beobvious that springs or equivalent means may be employed instead of theweighted lever J,

the remaining portion of the latter. .Inv this 1 construction, the vat Ais separated from its outiow-.end A; the two parts being connected bstay-bolts M or the like. The drum-en flange G is, as in theconstruction illustrate@ in Fig. 1, cast integral with the drum-end; theflange G being similarly 'formed on the ring N as shown, whereon thedrum rests in the cradle-arms 0;the latter occupying the space betweenthe vat A and the outflow A. The flange G is preferably furnished with afacing U. On the horseshoe-member E are formed arms L, L, the lower endsof which are connected together by means of an adjustable tension springas shown in Fig. 5. Or, as shown in Fig. 3, a weight W may be suspendedfrom the two arms L, L, with the effect that the faces of the joint aremaintained in mutuallcontact.

The upper extremities of the members E are bent over in the manner shownin Fig. l and are' supported on the top of the vat or upon theoutflow-end, as alsoA shown in Fig. 3. At a suitable distance therefromis a. lug or stop T and between the latter and the member E is a springS of dimensions suited to the pressure which .it isfdesired-to exertupon the member E in the direction'o the drum ange face. In'Fig. 6 isillustrated a modified construction wherein the' pliant and elasticseptum D is arranged horizontally.' Although, for the purpose ofillustrati..1-I,,-

I have described my improved method-'of j ointing as applied to astrainer-drum which' is rotated and is also subjected to vibratorymovements, it will be apparent that my present invention is equallyapplicable to strainer-drums which are rotated Without being vibrated,independent means being employed for agitating the paper-pulp undertreatment.

1. In a paper-pulp straining machine of the type comprising a rotatingdrum partly immersed in the pulp contained in the pulpvat and supportedin cradle-arms to which a vibratory motion is imparted, a face-joint,between the pulp-vat and the outlet for the strained material,consisting of a flange formed on the drum, a rubbing piece arrangedagainst the face of the said flange, and a semi-circular orhorse-shoe-shaped carrier to which the rubbing piece is attached; thesaid face joint being supplemented by a pliant and elastic septum whichextends between the carrier and the pulp-vat, and inreame() tercepts thecommunication between the latter and the outlet for the strainedmaterial substantiallyas set forth.

2. ln a paper-pulp straining machine of the type comprisin a rotatingdrum partly immersed in the pu p Contained in the pulpvat and supportedin cradle arms to which a vibratory motion is'imparted, the combinationwith a semi-'circular or horse-shoeshaped face-joint, between thepulp-vat and the outlet for the strained material, of a pliant andelastic septum extending between the pulp-vat and one of the rubbingsurfaces of the said face joint and intercepting communication betweenthe pulp-vat and the outlet for the strained material, substantially asset forth.

3. In a paper pulp straining machine, a

drum, a pulp-vat beneath said drum, a face- 'tion between the latter andthe outlet for the strained material.

Q14. In a paper pulp straining machine, a drum, a pulp-vat beneath saiddrum, a facejoint between the pulp-vat and the outlet for -the'strainedmaterial comprising a flange on "said drum, a rubbing-piece held againstsaid '-ilange, a carrier for said rubbing-piece and a pliant, elasticseptum extending between said 'carrier and the pulp-vat and interceptingthe communication between the latter and the outlet for the strainedmaterial.

5. In a paper pulp straining machine of the typev comprising a rotarydrum partly immersed in the pulp contained in the pulpvat and subj ectto a vibratory motion, a facejoint between the pulp-vat and the outletfor the strained material comprising al flange on said rotary drum, arubbing-piece held against the face of said iange, a carrier for saidrubbing-piece and a pliant, elastic septum extending between saidcarrier and the pulp-vat and intercepting the communication between thelatter and the outlet for the strained material.

WlLLIAM WORBY BEAUMONT.

Witnesses:

A. J. KIMMINS, A. F. BRoUGH.

